Table II.
Demographic characteristics of included cases and controls.
| Cases (n=572) | Controls (n=572) | |||||
|---|---|---|---|---|---|---|
|
|
|
|||||
| Variable | n | % | n | % | t or χ2 | P-value |
| Age, years | ||||||
| <55 | 249 | 43.53 | 253 | 44.23 | ||
| ≥55 | 323 | 56.47 | 319 | 55.77 | 0.06 | 0.810 |
| Gender | ||||||
| Female | 220 | 38.46 | 220 | 38.46 | ||
| Male | 352 | 61.54 | 352 | 61.54 | 0.00 | 1.000 |
| Cancer history in first-degree relatives | ||||||
| No | 522 | 91.26 | 569 | 99.48 | ||
| Yes | 50 | 8.74 | 3 | 0.52 | 43.70 | <0.001 |
| Alcohol drinker | ||||||
| Never | 333 | 58.22 | 375 | 65.56 | ||
| Ever | 239 | 41.78 | 197 | 34.44 | 6.54 | 0.010 |
| Cigarette smoker | ||||||
| Never | 386 | 67.48 | 424 | 74.13 | ||
| Ever | 186 | 32.52 | 148 | 25.87 | 6.11 | 0.010 |
| Helicobacter pylori | ||||||
| Negative | 201 | 35.14 | 308 | 53.85 | ||
| Positive | 371 | 64.86 | 266 | 46.50 | 39.80 | <0.001 |